Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMITSUBISHI2004DIAMANTE V6-3.5L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE FULL CLOSE SWITCHADJUSTMENTSWITH TRACTION CONTROL
2004 Mitsubishi Diamante V6-3.5L SOHC
With Traction Control
2004 Mitsubishi Diamante V6-3.5L SOHCSECTION With Traction Control
CLOSED THROTTLE POSITION SWITCH AND ACCELERATOR PEDAL POSITION SENSOR ADJUSTMENT
1. Connect the scan tool to the data link connector. When not using the scan tool, proceed as follows.
1. Disconnect the connector of the accelerator pedal position sensor.
2. Connect an ohm meter between terminal 3 (closed throttle position switch) and terminal 4 (sensor ground) by using jumper wires.
2. Insert a feeler gauge with a thickness of 0.85 mm (.0334 in.) between the levers shown in the illustration to a depth of no more than 3 mm (.1181 in.)
NOTE: Inserting the feeler gauge more than 3 mm (.1181 in.) will result in incorrect adjustment.
3. Turn the ignition switch to ON (but do not start the engine).
4. Loosen the accelerator pedal position sensor mounting bolt; then turn the accelerator pedal position sensor body counter clockwise as far as it will go.
5. In this condition, make sure that the closed throttle position switch is ON. (There is continuity between terminals 3 and 4.)
6. Slowly turn the accelerator pedal position sensor clockwise until the point at which the closed throttle position switch is turned OFF (continuity between terminals 1 and 2 changes to non-continuity) is found.
Tighten the accelerator pedal position sensor installation bolt at that position.
7. When using the scan tool, select "Traction Control System". When not using the scan tool, proceed as follows.
1. Disconnect the accelerator pedal position sensor connector and connect the special tool (test harness: MB991348) in between.
2. Connect a digital voltmeter between terminal 2 (sensor output) and terminal 4 (sensor ground).
3. Turn the ignition switch to ON (but do not start the engine.
8. Check the accelerator pedal position sensor output voltage.
Standard value: 400-1,000 mV
9. If the voltage is outside the standard value, check the accelerator pedal position sensor and related harnesses.
10. Remove the feeler gauge.
11. Turn the ignition switch to OFF.
12. Disconnect the scan tool.
When the scan tool is not used, remove the special tool and connect the accelerator pedal position sensor.
1. Connect the scan tool to the data link connector. When not using the scan tool, proceed as follows.
1. Disconnect the connector of the accelerator pedal position sensor.
2. Connect an ohm meter between terminal 3 (closed throttle position switch) and terminal 4 (sensor ground) by using jumper wires.
2. Insert a feeler gauge with a thickness of 0.85 mm (.0334 in.) between the levers shown in the illustration to a depth of no more than 3 mm (.1181 in.)
NOTE: Inserting the feeler gauge more than 3 mm (.1181 in.) will result in incorrect adjustment.
3. Turn the ignition switch to ON (but do not start the engine).
4. Loosen the accelerator pedal position sensor mounting bolt; then turn the accelerator pedal position sensor body counter clockwise as far as it will go.
5. In this condition, make sure that the closed throttle position switch is ON. (There is continuity between terminals 3 and 4.)
6. Slowly turn the accelerator pedal position sensor clockwise until the point at which the closed throttle position switch is turned OFF (continuity between terminals 1 and 2 changes to non-continuity) is found.
Tighten the accelerator pedal position sensor installation bolt at that position.
7. When using the scan tool, select "Traction Control System". When not using the scan tool, proceed as follows.
1. Disconnect the accelerator pedal position sensor connector and connect the special tool (test harness: MB991348) in between.
2. Connect a digital voltmeter between terminal 2 (sensor output) and terminal 4 (sensor ground).
3. Turn the ignition switch to ON (but do not start the engine.
8. Check the accelerator pedal position sensor output voltage.
Standard value: 400-1,000 mV
9. If the voltage is outside the standard value, check the accelerator pedal position sensor and related harnesses.
10. Remove the feeler gauge.
11. Turn the ignition switch to OFF.
12. Disconnect the scan tool.
When the scan tool is not used, remove the special tool and connect the accelerator pedal position sensor.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.